Jagpal

Question 1

Does pulmonary circulation have High or low resistance?

Answer 1

Low

Question 2

True or False:

1) Pulmonary arteries are thinner walled than systemic arteries
2) Less vascular smooth muscles in pulmonary arteries
3) Pulmonary vessels are more distensible than systemic arteries

Answer 2

All true

Question 3

Hypoxic Pulmonary Vasoconstriction

Answer 3

We’ve see this before. Basically when pulmonary arteries vasoconstrict when in the presence of an alveoli that is not ventilating properly in order to shunt the blood to alveoli that are being well ventilated.

Question 4

WHy does pulmonary edema impact gas transfer?

Answer 4

Fluid that should be in circulation ends up in the lung and subsequently in the alveoli, which impedes gas transfer.

Question 5

How does the lung get perffused??

Answer 5

1) small amount of systemic blood flow goes to the bronchial tree
2) mixed venous blood in pulmonary circulation.

Question 6

What would cause a flattened ventricular septum?

Answer 6

If you force the right ventricle to increase it’s workload by increasing pulmonary pressures. It will cause dilation of the RV and thus a flattened septum.

Question 7

How can you cause increased Zone 1? Zone 3?

Answer 7

Zone 1 - put patient on PEEP/ventilator

Zone 3 - exercise because blood flow will increase

Question 8

What would. Cause pulmonary edema?

Answer 8

• lymphatic insufficiency
• congestive heart failure
• increased endothelium permeability
• increased capillary hydrostatic pressure
• decreased interstitial hydrostatic pressure
• increased interstitial oncotic pressure
• decreased capillary oncotic pressure